Sith Elsa, because the cold doesn't bother some people, and that's when she needs to go and shank a *****.
Does homoerotic count as manly?
Cause you could just do what everyone else does and read Jojo for that sort of stuff.
Also, just don't do safebooru unless you know what character or show you're looking for that has that sort of stuff. Anime is too full of moe and hairless pretty boy high schoolers with more sparkles than muscles.
Bleach can also get pretty manly, with a pretty huge variety in terms of the male characters. Shunsui might be what you're looking for.
Then, of course, there's GARcher himself. Especially if you're looking for a well defined back, petite badass girl standing behind him optional.
Or the more subtle approach
But the fact is if what you're looking for is the rugged hero with the chiseled jawline and spit curl, or the victorious hero with a sword in one hand with medusa's cut off head head in the other, you really ought be looking for Western art, either popular culture or...like, actual art.
Is there anything in particular you're looking for?